DGI Supply – The Productivity People! Why are we known as the Productivity People? Since 1927, when the company founder invented the band saw, DoALL/DGI has been known as the “Productivity People”. We have always focused on meeting our customer’s needs. Today we call ourselves the Productivity People focused on saving our customers money. DGI Supply is a national/ international company with revenues exceeding $300 million and inventory in excess of $30 million. We primarily service metal working, metal forming, fabrication, chip making and manufacturing companies.